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RailKing SD-90 MAC Operating Manual
NOTE
: When locking the engine in the Forward or Reverse positions, the whistle button will
blow the horn. But when locking the engine into the NEUTRAL position, the whistle button
may turn on or off sounds of the bell, coupler arming or coupler firing depending on the
transformer throttle voltage settings prior to the users attempt to lock out the engine.
Remember, the horn doesntt blow in NEUTRAL (unless you programmed it to do so using
Feature 25. See page 20 for details), only the bell rings or the coupler operates in NEUTRAL.
While it doesntt make any difference on how the lockout function operates, you may hear one
of the three different NEUTRAL-activated sounds.
To unlock the engine from the NEUTRAL position, follow the process to
unlock the engine in the Forward or Reverse directions above.
MANUAL REVERSE UNIT LOCKOUT
(Non-ProtoSound® Equipped Engines)
Engines not equipped with ProtoSound® can be manually locked into
Forward, Netural, or Reverse by sliding the lockout switch to the OFF
position after entering the desired reverse unit state (See Figure 1 on page
3). To operate the engine again in automatic mode, simply slide the switch
back to the ON position.
Note: Once the unit is locked out and an hour or more of non-use has passed, the reverse unit
may cycle into any of the three directional states. Should this occur, the ON/OFF switch
should be reset to the ON position to regain normal operation.
